Figs 5-10.
5: Drusus nigrescens, head and pronotum, frontal view (arrow: serrated pronotal ridge); 6: Drusus monticola, head and pronotum, frontal view (arrow: smooth pronotal ridge); 7: Drusus nigrescens, right midleg, posterior face (s= dorsal tibial setae); 8: Drusus nigrescens, first abdominal sternum (black: sclerotized setal bases); Fig. 9 - 10: Metanoea flavipennis, fifth instar larva; 9: first abdominal sternum (black: sclerotized plate and setal bases); 10: pronotum, left lateral view. Scale bars: 1mm.